/*
 * Copyright 2004 - 2013 Wayne Grant
 *           2013 - 2021 Kai Kramer
 *
 * This file is part of KeyStore Explorer.
 *
 * KeyStore Explorer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KeyStore Explorer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with KeyStore Explorer.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.kse.gui.dialogs;

import java.awt.Component;
import java.math.BigInteger;
import java.util.Date;

import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableCellRenderer;

import org.kse.utilities.StringUtils;

/**
 * Custom cell renderer for the cells of the RevokedCerts table of DViewCrl.
 *
 */
public class RevokedCertsTableCellRend extends DefaultTableCellRenderer {

	private static final long serialVersionUID = 1L;

	/**
	 * Returns the rendered cell.
	 *
	 * @param jtRevokedCerts
	 *            The JTable
	 * @param value
	 *            The value to assign to the cell
	 * @param isSelected
	 *            True if cell is selected
	 * @param row
	 *            The row of the cell to render
	 * @param col
	 *            The column of the cell to render
	 * @param hasFocus
	 *            If true, render cell appropriately
	 * @return The renderered cell
	 */
	@Override
	public Component getTableCellRendererComponent(JTable jtRevokedCerts, Object value, boolean isSelected,
			boolean hasFocus, int row, int col) {
		JLabel cell = (JLabel) super.getTableCellRendererComponent(jtRevokedCerts, value, isSelected, hasFocus, row,
				col);

		if (col == 0) {
			cell.setText(formatSerialNumberAsHexString((BigInteger) value));
		} else {
			cell.setText(StringUtils.formatDate((Date) value));
		}

		cell.setBorder(new EmptyBorder(0, 5, 0, 5));

		return cell;
	}

	private String formatSerialNumberAsHexString(BigInteger serialNumber) {
		// The string is divided by spaces into groups of four hex characters.
		String hexSerialNumber = serialNumber.toString(16).toUpperCase();

		StringBuilder strBuff = new StringBuilder();

		strBuff.append("0x");

		for (int i = 0; i < hexSerialNumber.length(); i++) {
			strBuff.append(hexSerialNumber.charAt(i));

			if ((i + 1) % 4 == 0 && i + 1 != hexSerialNumber.length()) {
				strBuff.append(' ');
			}
		}

		return strBuff.toString();
	}
}
